<template>
  <div class="validate-input-container pb-3">
    <input
      v-if="tag !== 'textarea'"
      class="form-control"
      :class="{ 'is-invalid': inputRef.error }"
      @blur="validateInput"
      v-model="inputRef.val"
      v-bind="$attrs"
    />
    <textarea
      v-else
      class="form-control"
      :class="{ 'is-invalid': inputRef.error }"
      @blur="validateInput"
      v-model="inputRef.val"
      v-bind="$attrs"
    ></textarea>
    <span v-if="inputRef.error" class="invalid-feedback">{{
      inputRef.message
    }}</span>
  </div>
</template>

<script lang="ts">
import { defineComponent, reactive, PropType, onMounted, computed } from "vue";
import { emitter } from "./ValidateForm.vue";
const emailReg = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/;
interface RuleProp {
  type: "required" | "email" | 'custom';
  message: string;
  validator?: () => boolean;
}
export type RulesProp = RuleProp[];
export type TagType = 'input' | 'textarea'
export default defineComponent({
  props: {
    rules: Array as PropType<RulesProp>,
    modelValue: String,
    tag: {
        type: String as PropType<TagType>,
        default: 'input'
    }
  },
  inheritAttrs: false,
  setup(props, context) {
    const inputRef = reactive({
        val: computed({
            get: () => props.modelValue || '',
            set: val => {
                context.emit('update:modelValue',val)
            }
        }),
        error: false,
        message: ''
    })
    const validateInput = () => {
      if (props.rules) {
        const allPassed = props.rules.every(rule => {
          let passed = true;
          inputRef.message = rule.message;
          switch (rule.type) {
            case "required":
              passed = (inputRef.val.trim() !== "");
              break;
            case "email":
              passed = emailReg.test(inputRef.val);
              break;
            case 'custom':
              passed = rule.validator ? rule.validator() : true
              break;
            default:
              break;
          }
          return passed;
        });
        inputRef.error = !allPassed;
        return allPassed;
      }
      return true;
    };
    onMounted(() => {
      emitter.emit("form-item-created", validateInput);
    });
    return {
      inputRef,
      validateInput
    };
  }
});
</script>
